Superheater-boiler.



No. 797,256. PATE'NTED AUG. 15, 1905.

I J. E. BELL,

SUPERHEATER BOILER.

AAAAAAAAA OFLIILED NOV. 25, 1904.

, tubes 11.

PATENT OFFICE.

JOHN E. BELL, OF BARBERTON, OHIO, ASSIGNOR TO THE STERLING COLIPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

SUPERHEATER-BOILER.

Patented Aug. 15, 1905.

To (LI/Z whom, it may concern.-

Be it known that I, JOHN-E. BELL, of Barberton, Summit county, Ohio, have invented a new and useful Superheater-Boiler, of which the following is a full, clear, and exact description, reference being bad to the accom-' I have found that by placing at least three banks of water-tubes in front of the superheater and locating the superheater in the last pass of the gases the heat of the gases will be sufiiciently extracted and considerable superheat may be obtained. The eflect may also be produced to some extent by giving at ieast three passes to the gases before reaching the superheater, whether these passes are over separate banks of tubes or successive asses over the same bank of tubes.

In the drawings, referring to the form of g. 1, I show a boiler having'upper transse steam and water drums 2, 3, and 4, conted by banks of tubes 5, 6, and '7 to the ld-drum 8. The drums 3 and 4: may be concted by water-tubes 9 and steam-tubes 10 .nd the drums 2 and 3 connected by steam- The gases are given serial passes over banks of water-tubes by the baffles 12, 13, and 1a. At the rear of the boiler proper is placed the superheater, which I have shown as comprising an upper steam-drum 15, connected to a lower steam-drum 16 by tubes 17, having a rear bafiie 18. The steam is preferably led by pipes 19 from the drum 2 into an end compartment formed by a transverse partition in drum 15 and thence flows down to drum 16 and up to the other compartmentdrum 15, whence it may be taken offthrough outlet 20. The gases flow in serial up and down passes, first over the three banks of water-tubes and then over the superheating tubes and to the stack-flue.

In Fig. 2 I show a form similar to that of Fig. 1, except that the two mud-drums 8 and 21 are employed. In this view similar parts are marked with the same number with the letter a applied.

In the form of Fig. 3 two steam and water drums 3" and 4: are employed, the middle bank of water-tubes 6 extending from the drum 4" to the rear mud-drum 8, while the front bank of tubes 7 leads to the front mud-drum 21". In this form the' two muddrums may be made in the form of one, so that the tubes 6 and '2' become practically a part of the same bank, with a baflie between them to 'give an up-and-down pass. In this form similar parts are marked with the same numerals with the letter 6 applied.

In Fig. 4 I show a form similar to that of Fig. l eiccept that an additional mud-drum 22 is provided with a bank of tubes 23, leading from it up to the rear steam and water drum 2. The fourth pass is thus given to the gases before they reach the superheater. In this case parts similar to those of Fig. 1 are marked with the same numeral with the letter 0 applied.

In all the forms the gases from furnace F are given at least three serial passes over water-heating surface formed of water-tubes extending between transverse upper and lower drums before reaching the superheater. I thus place the superheater in a region of low temperature and efiiciently extract the heat of the gases, while providing for considerable superheating of the steam.

Variations may be made in the form and arrangement of the boiler and the superheater portion without departing from my invention.

I claim- 1. A boiler having transverse upper and lower drums connected by banks of watertubes, bafiles arranged to give the gases at least three up-and-down passes over said water-tubes, said water-tubes. comprising the entire heating-surface of the first three passes and a superheater in the rear of the boiler properwithin its setting and in the last pass of the gases; substantially as described.

2. A boiler having transverse upper and lower drums connected by at least three banks of water-tubes, baffies arranged to give the gases serial up-and-down passes over said water-tubes, said water-tubes comprising the entire heating-surface of the first three passes and a superheater in the rear of the boiler proper within its setting and in the last pass of the gases; substantially as described.

|0n in Letters Patent No.

3. A boiler having transverse upper and lower drums connected by three banks of Watar-tubes, baflles arranged to give the gases serial up-and-down passes over said watertubes, said water-tubes comprising the entire heating-surface of the first three passes and a superheater in the rear of the boiler proper Within its setting and in the last and fourth pass of the gases, said superheater comprising upper and lower transverse drums connected by superheating-tubes; substantially as described.

In testimony whereof I have hereunto set my hand.

JOHN E. BELL. Witnesses:

JOHN PRENTIOE, J. (J. FRANK.

It is hereby certified that the name of the assignee in Letters Patent No. 797,256,

granted August 15, 1905, upon the application of John E. Bell, of Barberton, Ohio,

for an improvement in Superheater-Boilers, was erroneously written and printed The Sterling Company, whereas the said name should have been Written and printed The Stirling Company; and that the said Letters Patent'should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 10th day of October, A. D., 1905.

[sEAn] F. I. ALLEN,

|0n in Letters Patent No.

3. A boiler having transverse upper and lower drums connected by three banks of Watar-tubes, baflles arranged to give the gases serial up-and-down passes over said watertubes, said water-tubes comprising the entire heating-surface of the first three passes and a superheater in the rear of the boiler proper Within its setting and in the last and fourth pass of the gases, said superheater comprising upper and lower transverse drums connected by superheating-tubes; substantially as described.

In testimony whereof I have hereunto set my hand.

JOHN E. BELL. Witnesses:

JOHN PRENTIOE, J. (J. FRANK.

It is hereby certified that the name of the assignee in Letters Patent No. 797,256,

granted August 15, 1905, upon the application of John E. Bell, of Barberton, Ohio,

for an improvement in Superheater-Boilers, was erroneously written and printed The Sterling Company, whereas the said name should have been Written and printed The Stirling Company; and that the said Letters Patent'should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 10th day of October, A. D., 1905.

[sEAn] F. I. ALLEN,

W. ,iion in Letters Patent No.

It is hereby certified that the name of the assignee in Letters Patent No 737,256, granted August 15, 190.3. upon the application of John E. Bell, of Bavrbcrlon. Ohio for an improvement in Superheater-Boilers, was erroneously written and printed "The Sterling Company} whereas the said name should have been written and printed The Stirling Company; and that the said Letters Patent should be read wilh Lillfi correction [herein that LIH' mine may conform to the record of the casein the Patent ()flice.

Signed and smiled thir 10th (hi of October, A. 1)., 1905.

F. I. ALLEY,

Commissioner 0] luienls.

[SEAL] 

